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CVE-2011-1999

57
FAUCET Score

CVE-2011-1999 is a critical remote code execution vulnerability affecting Microsoft Internet Explorer 8 on various Windows operating systems, including Windows 7, Vista, XP, and Server editions. It stems from improper memory allocation and access, allowing attackers to execute arbitrary code through a "dereferenced memory address" when a user visits a malicious webpage. With a CVSS score of 9.3, this vulnerability is highly severe, requiring no authentication and having a medium attack complexity but full confidentiality, integrity, and availability impact. While not listed on the CISA KEV catalog, an ExploitDB entry (EDB-36209) confirms the existence of public exploit code, although there is no evidence of widespread active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
8CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
27.96%
Probability of exploitation in next 30 days
EPSS Percentile
97.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-36209 · Oct 11, 2011
This CVE's current EPSS score of 0.2796 is in the 92nd percentile among its peer group of 8,915 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

docs.microsoft.com / en-us/security-updates/securitybulletins/2011/ms11-081
PatchVendor Advisory
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12697
Tool Signature
securityfocus.com / bid/49964
Broken LinkThird Party AdvisoryVDB Entry